(C) Wheat
Wheat is a rabi crop sown in October–December and harvested in April–June. The Delhi–Chandigarh route passes through Punjab and Haryana, which are major wheat-producing states. In January, wheat fields would be prominently visible.
The key clues are month (January) → rabi season, and route (Delhi–Chandigarh) → Punjab/Haryana belt. Paddy and Maize are kharif crops (harvested by October); Jowar is also mainly kharif. Only Wheat fits both the season and the region. Examiners expect you to link the season + geography to identify the correct crop.